That's an interesting point. But obviously the animal learns to adopt a "go along to get along" position within its group because it's in its best interest to do so. This is a learned behavior centered on social interactions. When a human feels convicted in his heart it's not about social interactions or group dynamics but rather an inherent knowledge that the action was wrong, even if it was personally beneficial.
I doubt we can call our knowledge of right and wrong "inherent". What is right and wrong for a person is most often dictated by the environment they grow up in. This can easily be seen across the world! In America, it is considered morally wrong to harm anyone for merely expressing their views verbally. In numerous Muslim countries, speaking ill of one's religion is not only worse than harming others, but should be punishable by physical harm! In Japan, it is considered rude to wear your shoes inside another person's house, though nobody blames you in America or any nation situated far north.
There are some basic instincts that are natural. For example, human beings naturally enjoy emotions such as love and happiness. So human kind is going to gravitate towards doing things that help them achieve those emotions. It turns out, being kind to others leads to this kind of happiness. We also have the natural inclination to work towards certain goals - such as punishing ourselves during the day at work as a means of obtaining money so we can both live and live comfortably. The mind of animals is incredibly complex, and the human mind being - perhaps - the most complicated.
We don't have to look far to see the relations of human emotion and animal emotion.
Koko Responds to a Sad Movie - YouTube
Koko the Gorilla with Robin Williams.mp4 - YouTube
Of course, the levels of emotion in animals are going to differ from species to species, from order to order.
Design implies a thoughtful designer (be it a car maker or a person maker).
It's fallacious to assume that if one object was created by someone, all objects must have been created by someone. You can use the same logic to create equally fallacious statements, "When you look at a rock in your back yard, you know it wasn't created by a person, therefore no objects have a creator!" Just because a watch has a watch designer does not necessarily mean people have a person designer, or rocks have a rock designer, or stars have a star designer.
The world isn't all or nothing - where
everything has to be either created or not created. It is possible for some things to be created and other things to exist naturally (being created through natural processes).
A conscience implies a moral law giver.
Well, no, it doesn't. That's an assumption. There's no reason to believe a conscience implies a moral law giver any more than it implies natural emotion. This is why scientists spend so much time examining the behaviors of humans, apes, and other animals.